Greywolf on Excal and AT forum sells wrapped ARROWS. Bolts were medevial and about 6" long. I got a dozen from him last year and they were great. Wraps add about 10 gr to the arrows. The wraps are hard to remove to refletch. Real hard. Here's a link to an alternative, easy to put on and take off. Just be sure to use laquer not enamel. The wraps I had held up fine, but need to be removed if you need to refletch.
http://www.texastrackers.com/Videos/Arrows.wmv Good luck!!